Classifications?

[PRW1988]

Alright, so I'm just wondering... what are the tank size classifications and how many gallons are there in each of them?
I mean, I've heard of Pico, which I think is 2gallons and less, and of nanos which I believe are 2gallons-30gallons... But are those even right? Could anybody help me out with all the classifications of sizes and the gallons?

Thanks much

 

[The-Wolf]

pico is a prefix applied to things that are smaller than a nano
if I remember correctly it is micro- nano- then pico-
in mathematical terms, pico is equivalent to a billionth (UK term) of one or as a numerical value 0.000 000 000 001

 

[PRW1988]

uhh, lol wow... Well I guess that's close to what I asked for... now how about in terms that don't make me think too hard Sorry, all I meant with the OP was "how many gallons does each classification -nano, pico, etc.- have?"